coincidence or did i cause this,

[wellcraftv20step]

Hey all , A while back I picked up a beautiful 22 Imp walk around with a 5.0 mercruiser Alpha 1 for my son in law, I started it for the first time last week and it started and ran great then I started it a couple days later and it ran perfect again. Here's the rub . I decided to do a compression test and all cyl,s registered about 150 ,so now I put the plugs back in and I cant start the engine. No spark at the thunderbolt iv v8 22 ignition module. my question is could this have been caused by the constant cranking of the compression test or is it just coincidence, and I did change rotor, cap, plugs and coil

[spareparts]

First, check the kill switch on the shifter, make sure you didn't flip it off or pull on the cord, reset it and know you're good. Then jiggle the shifter and retry, you may have activated the shift switch that shorts out the ignition so the drive will come out of gear.If that didn't fix it, pull the cap off and make sure nothing broke, its easy to not push the rotor all the way down and the first time you spin it over, it breaks something. After that, try this http://www.boatfix.com/merc/Bullet/83/83_24.pdf

[wellcraftv20step]

Thanks so much Spare, I changed out the Rotor cap and coil after it would not start just because I would have done that as regular maintenance anyway, and I actually found and followed that series of test you suggested and that's how I came to conclusion that I need the ignition module. However I will try that shift control idea !!!!

[wellcraftv20step]

Spare, i got a used thunderbolt ignition module and still no spark,finally i found the problem it was a short in the wiring harness coming out of the module. Running great now. now onto the outdrive. thanks as allways

[wellcraftv20step]

I see that when I start her warm I need to put the throttle full forward or wide open, she sputters for a second then clears rite up. any suggestions.

[smokeonthewater]

back off the choke a little